JPS61144782A - Alignment disk - Google Patents

Abstract

PURPOSE:To store and read correcting values of manufacturing error of a disk and data of adjusting and inspection by providing a format that prescribes the method of storing and the storing place information for storing and reading information by digital signals and writing analog signals for measuring the position and angle of a magnetic head. CONSTITUTION:Tracks from the outermost track 2 to the innermost track 5 are provided on a disk, and tracks are disposed to make the innermost one 39 tracks. The face of the disk is divided radially from the center 14 into 16 equal parts, and sectors are distributed from 1 sector 6 to 16 sectors 10. The format is so made that head information of a file is stored in 1-12 sectors of 18 tracks of one side 1, the attribute, number of files and text that determines the number of files automatically are stored in 13 sectors, and FAT is stored in 14-16 sectors. Index signals for timing 13, head position adjusting signals 11 and adjusting signals for tangential direction and the position of tracks 12 and analog data for measuring the position and angle of the head are recorded on both sides.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention provides a method for adjusting the position of a magnetic head of a disk drive device.
Regarding alignment disks for inspection.

(Prior art) Inspecting errors in the position of the magnetic head of a disk drive,
The adjustment inspection machine used to inspect the radial position and angle of the magnetic head based on the waveform of the signal read by the magnetic head from an analog signal written on the alignment disk. For example, a head position adjustment signal in the radial direction consisting of a predetermined analog signal is stored in 16 tracks of an alignment disk, and the output waveform of this signal read by a magnetic head is shown by an envelope in FIG.

In FIG. 4, the two peaks of the output waveform correspond to one rotation of the alignment disk, and the left end is the position of the index signal of the alignment disk.

When the two maximum amplitudes and B are equal, the magnetic head is located exactly on the 16th track, and the amount of deviation of the magnetic head from the 16th track is determined by the ratio of A/Bi or B/A. In this case, it can be seen that if the amplitude A is larger than B, the magnetic head has shifted toward the inner circumference of the alignment disk, and conversely, if the amplitude B is larger than A, the magnetic disk has shifted toward the outer circumference of the alignment disk.

Furthermore, four types of analog signals tilted at a predetermined angle with respect to the track are written on one of the edges of the alignment disk, and the envelope of the output waveform when these signals are read by a magnetic head is shown in Figure 1g5. If there is no tilt of the magnetic head, the amplitudes C and F are strange, and since the amplitudes and E are equal, the tilt angle of the magnetic head can be determined from the ratio of C/D or F/E.

Using the above method, while determining the amount of deviation and inclination of the magnetic head of the disk drive with respect to the alignment disk set in the disk drive, the magnetic head is removed using the motor installed in the adjustment inspection machine. The attachment is for adjusting the inclination with respect to the component, and the mounting is for adjusting the position of the step motor that moves the component in the disk drive device, and finally fixing the step motor in the disk drive device when it is within the specifications for a good product. However, the magnetic head was fixed to the mounting member.

Conventionally, this type of alignment disk has recorded only a magnetic pattern as an analog signal for measuring the position of the magnetic head, etc., and has been used exclusively to obtain a signal for adjusting and inspecting a disk drive device. On the other hand, in the vI41i inspection of a high-density, highly reliable disk drive device, it is necessary to correct for manufacturing variations in alignment disks.

(Problems to be Solved by the Invention) In the conventional 7-alignment disk described above, the manufacturing error of each alignment disk is recorded on a label, etc., and a person reads the label and calculates the correction value due to the manufacturing error of the alignment disk used. was input to the disk drive 0vIJ inspection machine. Therefore, there is a drawback that inputting correction values requires human judgment and effort. Another disadvantage is that it is necessary for a person to write down data after adjustment and inspection, the number of times the alignment disk has been used, etc. on a recording paper or the like.

An object of the present invention is to format the alignment disk to store information in the form of digital signals, thereby making it possible to store correction values due to manufacturing errors of each alignment disk and data after adjustment and inspection of the disk drive device. It is an object of the present invention to provide an alignment disk that allows a disk drive device to be adjusted and inspected by automatically inputting values into an adjustment and inspection machine.

(Means for Solving the Problems) The alignment disk of the present invention is provided with a format that specifies the storage method and storage location for storing and reading information based on digital signals, and furthermore, the alignment disk is provided with a format that specifies the storage method and storage location for storing and reading information based on digital signals, and furthermore, Characterized by convoluted analog signals for measuring position and angle.

(Example) Next, embodiments of the present invention will be described with reference to the drawings.

The first diagram is a schematic diagram of an embodiment of the present invention, and is a 5.25 inch 4
From 8TPI double-sided double-sided flexible disk, reference number 2.3 0.1 track to reference number 4, 5-3
8.39t? Each track is arranged concentrically from the outer circumferential side, starting with the O track, and increments tb sequentially so that the innermost circumference has 39 tracks, and the disk surface is divided radially from the center of the center hole with reference numeral 14. Equally distributed, 1 sector with reference number 6, reference number 7゜8
The sectors are arranged sequentially from 2.3 sectors at 1 to 15°16 sectors at reference numbers 9 and 10. Further, 1 to 12 of the 18 tracks on one side of 7, indicated by the reference numeral l.
A sector is a physical area that stores file names, extensions, attributes, and information on the starting position where the file is stored, and 13 sectors store BA8IC text that automatically determines the attributes, number of files, and number of files. And then 14 more
~ For a disk formatted to store a table called FAT that shows the usage status of each sector in 16 sectors, 125 is stored in the 0 track of reference number 2 on both sides.
One-round magnetic storage at KHz, 1 track with reference numeral 3 is an index signal with reference numeral 13 that adjusts the timing in the sector direction, 16 tracks with reference numeral 11 are a radial direction head position adjustment signal, and 32 tracks are a resolution check. A similar 125 KHz signal is applied to the 33rd track, a similar index signal is applied to the 34th track, and a similar index signal is applied to the 34th track. A signal indicating the tangential position of the head along a line tangent to the supported circular track is recorded as vI41i, and a 125 KHz signal indicating the innermost track position is recorded on the 39th track.

This alignment disk has a correction value RBo for side 0 (one side of the disk) and a correction value RBo for side 1 (the other side of the disk) as a correction value for the head position adjustment signal in the radial direction.
The side correction value Ral is stored on the disk via the burner combinator built in the A48 fold, for example, according to the procedure shown in the flowchart of FIG. Similarly, the correction value of the signal that adjusts the tangential position of the head along the line tangent to the circular track carried by the disk at the intersection of the track centerline and the fixed position radius is also equal to -1 yard in Figure 2. The data is stored in the 7 alignment disk shown in FIG. 1 according to the procedure shown. Next, the method of reading out these correction values is performed as shown in the flowchart of FIG.

The amount of deviation and inclination of the magnetic head obtained from the amplitudes A-F shown in FIGS. 4 and 5 are corrected by an information processing device such as a Bernal combinator using the correction values read from the alignment disk that stores the correction values. It is possible to accurately determine the amount of deviation and inclination of the magnetic head without human effort or judgment, and it is possible to automatically adjust the disk drive device taking into account manufacturing errors of the alignment disk.

It is also possible to automatically record the number of times the alignment disk has been used, as well as the positional deviation and inclination of the magnetic head of the disk drive device after WJI4 (which is within the standard for a good product) on the alignment disk. It is.

In addition, the BASIC created according to the flowchart in Figure 2) K
An example of 70 grams at @@ is shown below.

100'110'Write to the disk12
0 FIEI, D $0.128 As A1.1
28 As B$130 L3ET A$=MKS
l(Ra, )140 LITi3$=MKS, $
(Ra,)150 D8KO$ 1.0.5.11
60 END The leftmost number in this program indicates the number of lines in the program, and lines 100 and 110 are notes and are irrelevant to program execution. Line 120 declares the length of data corresponding to the variable name when data is folded, φ0 is the file number, 1zsAs A4 is the length of variable A$ for 128 characters, and 128A8B41 is the length of variable B$. Indicates that the length is 128 characters. 130 and 140 are for assigning data to variables, and indicate that each of the correction values RaO+Ral is converted into character data and assigned to variables A$ and B$. Line 150 is for writing data to the specified location (drive number 1, surface number 01, track number 5, sector number 1) on the floppy disk (alignment disk), and line 160 indicates the end of the program.

In addition, BASIC was created according to the flowchart shown in Figure 3.
An example of a program in this language is shown below.

210 'Read from the disk
220 FIELD 0.128 As
A4.128 AE B$230 D=DSK
I $ (1, 0, 5, 1) 240 A skewer = MID (D $, 1.128) 250 B $ = MID $ (D
φ, 129,256) 260 NA-CV8 (A$
) 270 NB=CVS(B昂) 280 END In this program, lines 200 and 210 are notes, and line 220 is the same as line 120 of the program shown above. 23
Line 0 reads data from the specified location, drive number 1, surface number O.

Assign the data of track number 5 and sector number 1 to variable D$. Lines 240 and 250 extract only the necessary part of the read data, and convert the 1st to 128th characters of the variable D$ and the 129th to 256th characters into the variable A$, respectively.

Assign to B$. Lines 260 and 270 are for converting character variables 人$ and B$ into numerical variables NA and NB, respectively.

(Effects of the Invention) By formatting the alignment disk of the present invention for storing information using digital signals, it is possible to obtain signals for measuring the position and angle of the magnetic head, and to eliminate manufacturing errors of the alignment disk. It is possible to store and read out information such as correction values, etc., and there is an effect that it is not necessary to manually input correction values during adjustment inspection of a disk drive device.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of one embodiment of the present invention, FIG.
The figures are a flowchart showing the procedure for storing correction values on the alignment disk shown in Fig. 1, and a flowchart showing the procedure for reading out the stored correction values, respectively. FIG. 2 is a diagram showing an output waveform obtained by reading a radial head position adjustment signal with a magnetic head, and a diagram showing an output waveform obtained by reading a signal for measuring the inclination of the magnetic head on an alignment disk with a magnetic head. 2, 3.11.4.5...Track 0.1.1
6.38°39.6~10...Sectors 1~3.
15, 16.13... Index signal, A-
F...Amplitude. Agent Patent Attorney Shinkan Uchihara Figure 1

Claims (1)

[Claims] It is characterized by a format that specifies the storage method and storage location for storing and reading information in the form of digital signals, and further writing analog signals for measuring the position and angle of the magnetic head of the disk drive device. alignment disc.